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TIE LINE TANDEM SWITCHING
NEAX2000 IVS
2
Business/Hotel/Data Features and Specifications
Page 306
NDA-24271, Issue 1.0
TIE LINE TANDEM SWITCHING
General Description
This feature allows Trunk-to-Trunk connections through the system without the need for any Attendant assis-
tance or control. The major use of this feature is in association with a dial tandem tie line network to allow Tie
Line connections and incoming Tie Line calls automatic access to, and completion of, local C.O. calls.
Station Application
Not applicable.
Operating Procedure
1. E&M Tie Line is seized by distant end system.
2. Distant end system dials applicable trunk access code and desired number.
Service Conditions
1. When using a 2-wire application (ODT card), there may be a decrease in transmission decibel levels.
2. When using a 4-wire application, an ODT card is required for every Tie Line. This card provides attenuation
so that the desired transmitting and receiving levels can be maintained, providing the overall tandem system
with transparency.
3. When all Tie Lines are busy, the calling station will receive busy tone.
4. Incoming trunks may be restricted from outgoing access to other trunks on a trunk route basis.
5. Consideration should be given to access code numbering plans to avoid unnecessary loss of access codes
and code duplication within the same system.
6. There is no limitation on the allowable number of Tie Line Tandem Switching connections.
7. Incoming dial repeating Tie Lines can connect to the following types of outgoing trunks:
• Dial repeating tie lines
• C.O. trunks
• FX trunks
• WATS trunks
• CCSA trunks
8. All trunk routes assigned for no release signal are restricted from tandem connections.
9. The Station Message Detail Recording feature applies to incoming Tie Line calls which dial access an out-
going trunk.